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A.select * from department where dep_num in (1001,1002,1003);
B.select * from department where dep_num=1001 or dep_num=1002 or dep_num=1003;
C.select * from department where dep_num=1001 and dep_num=1002 and dep_num=1003;
D.select * from department where dep_num between 1001 and 1003;
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